/*
Copyright (C) 2015 Marien Raat

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

#include <random>

#include <diamondsquare.h>

class IslandHeightmapGenerator {
public:
    IslandHeightmapGenerator(std::mt19937 *mt);
    void initializeMap(
        int width,
        int height,
        double *modifiers,
        bool overwriteOldMap = true);
    void pass();
    void finishMap();
    void createNewMap(
        int width,
        int height,
        double *modifiers,
        bool overwriteOldMap = true);

    bool isMapDone();
    double *getRawDiamondSquareMap();
    int getCurrentPassSize();

    static double modifiedHeightValue(double h);

    double *islandMap;
private:
    DiamondSquareGenerator *dsGenerator;

    bool firstMap;
    int previousWidth, previousHeight, width, height,
        diamondSquareSize;

    void updateIslandMap();

    static double modifierFunction(int pass,
                                   double h,
                                   double *modifiers);
};
